Pot type burner with scoop pilot ring



- Nov. 13, 1945; B, AY ER 2,388,914

POT TYPE BURNER WITH SCOOP PILOT RING Filed March 14, 1942 7 h Z759. I L LLllll l l ll l l )l em ssmomws sea e as e eeeeeeea'soeooaoog 12 I \12 pilot stage.

' Patented Nov. 13, 1945 i POT {TYPE BURNER SCOOP PILOT RING Bruce Hayter, Santa Fe, N. Mex, assign:- to on Devices, Santa Fe, N. Mex, a limited partnership of Illinois Application March 14, 1942 Serial No. 434,665 I 1 Claim. (01. ss-cl) My invention relates to an improvement in pot type-oil burners and particularly to an improvement in pilot rings or bailles employed intermediate top and bottom of such burners."

One purpose is to provide improved means for controlling the admission of primary air at the Another purpose is to provide an improved form of baille ring.

Another purpose is to provide improved means for controlling the ratio between the primary and secondary air,

Other purposes willappear from time to time in the course of the specification.

I illustrate my invention more Or less diagrammatically in the accompanying drawing wherein: Fig. 1 is a vertical axial section; and 1 Fig. 2 is a section on the line 2-2 of Fig. 1. Like parts are indicated by like symbols throughout the specification and drawing.

Referring to the drawing, I generally indicates any suitable outer housing. which may beat any suitable shape and proportions but which I illustrate as a generally cylindrical drum. It may be supported on any suitable means, for example the feet 2. 3 is, a bottom partition having a central air inlet aperture 4. 5 indicates a burner pot, having a bottom portion 8; and an outwardly extending top flange 1, which may rest upon any suitable supporting ring I, inwardly extending from an inner wall of the outer housing I. 9 is a flame ring centrally apertured as at ll: II indicates a plurality of primary air inlet apertures, which are herein shown as located at a single level or in a single row. I: indicates a plurality of secondary air inlet apertures, located at a higher level and upwardly and inwardly tilted, and more closely spaced andlarger in cross sectional area than the primary inletapertures II. It will be understood, of course, that the air inlet apertures may be otherwise arranged and that other means may be employed for supplying secondary air to the upper portion of the pot. However, the structure herein shown i a practical and operative structure. f

ll indicates any suitable liquid fuel pipe which extends to a source of liquid fuel not herein shown. It will be understood that any suitable means not herein shown may be employed for varying or controlling, automatically or manually, the flow of liquid fuel along the pipe II. It will be understood that preferably a minimum flow is provided so that the flre in the pot is con stantly maintained and never drops below the so-called pilot stage.

it indicates a battle ring or pilot ring centrally apertured as at It. and supported on any suitable supports, such as the pins i8 inwardly extending from the wall of the pot I. The ring is shown as slightly frusto-conic and is provided about its periphery with a plurality of scoops i'lwhich extend downwardly below the level of the primary air inlet apertures Ii and blank out a certain number of them. Itwill be understood that such of the apertures II as are outof line with the scoops deliver the primary air to the space below the baille i5, whereassuch as are-aligned with the scoops deliver air to the space above the balls It. A conical pin is secured in the wall I engages a notch its in the baiile ring il andsssures the alignment of the hole lid with the scoops ll.

At the pilot stage the fuel flowing in through the pipe it tothe bottom 8 is vaporized by the heat of combustion taking place at the general level of the pilot ring II. The apertures i I which deliver below the pilot ring provide primary air for the mixture, and the mixture of primary air and vaporized iuel receives the secondary air at or above the plane of the aperture ii of the-pilot ring it. At this stage'at least part ofthe secondary air supply is provided by the air inlet; Ii which are blanked out by the scoops ll. The

size of the holes may be difl'erential, and it "will be observed, as in Fig. 2, that the holes ii are of smaller cross sectional area than the individual holes ila which are blanked out by the scoops.

In other words, by the employment of the diiferential size of the apertures, or by the employment of pilot rings having scoops of various arcs of extension, or both, I can take ofi as much of the air coming in at the primary level as I want tow and deliver it as secondary air to the space above the-baflle II. Thus, the ratio of the primary and secondary air may be controlled as desired.

It will be understood that,'whereas at the pilot stage the air delivered below the pilot ring serves as primary air, and the air delivered above the pilot ring serves as secondary air, at the high fire stage, all of the lower apertures serve as pri-' mary air inlets, and the secondary air is delivered to the mixture through the secondary air inlet apertures II. V a

It will be realized that, wherea I have illustrated and described a practical and operative device, nevertheiess many changes may be made in the size, shape, number and disposition of ports without departin from the spirit of my invention. I therefore wish that the description and. drawing be taken as in alargc sense illustrative and diagrammatic, rather than as a limitation to the precise showing.

I claim:

In a pot type burner, a burner pot having a circumferential side wall and a bottom, means 5 E to the interior or the pot above said baffle ring, the air inlet apertures aligned with said scoop for delivering liquid fuel to a lower portion of the pot for vaporization, said side wall having primary air inlet apertures extending about the pot intermediate the top and bottom of the pot, means for delivering secondary air to an upper portion of the pot, a baiile ring located adjacent the level or said primary air inlet apertures, some I of the primary air inlet apertures being positioned to deliver air belowthe baflie ring, the

battle ring having downwardly extendingscoop portions aligned with other of said primary air inlet apertures and adapted to direct primary air portions being of materially larger diameter than the other primary air inlet apertures and in com- 10 munication with the space below the baflie ring.

BRUCE HAYTER. 

